... -position operation 3. pneumatic Adv.:high-efficiencyINTRODUCTION:5kw double heads high frequency welding machine is suitable for raincoat ,PVC stationery welding etc ... , shoes, hats, blister package, stationery, tool, bag & suitcase, bath curtain, rainwear, umbrella, handbag, packaging bag, wallet, leather belt, mobile cleaner, electrical hot ...